Historically, most of the Cowboy's best safeties in their history were undrafted free agents.
Cornell Green, Cliff Harris, Michael Downs and Bill Bates have combined for a lot of Pro Bowls, 1st team All Pros and SB rings.
Successfully acquiring talent in the lower rounds and free agency is the key to building successful teams in the NFL today. They may or may not become household names but they are extremely cap friendly if they break out early.
Rookie Michael Downs had seven INT's and a fumble recovery in 1981, the same season another undrafted free agent by teh name of Everson Walls had eleven INT's and a fumble recovery.
Today that would be 20 turnovers by two rookies on minimum wage. Do i expect to ever see that again? of course not but my point is there is talent out there in rookie free agency for those clubs that can identify it and hold on to them.
The list of successful rookie free agents that the Cowboys cut is staggering from Jim Zorn to Danny Amendola.